diff options
Diffstat (limited to 'fpga/usrp2/gpmc/gpmc_sync.v')
| -rw-r--r-- | fpga/usrp2/gpmc/gpmc_sync.v | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/fpga/usrp2/gpmc/gpmc_sync.v b/fpga/usrp2/gpmc/gpmc_sync.v deleted file mode 100644 index ba7251c8d..000000000 --- a/fpga/usrp2/gpmc/gpmc_sync.v +++ /dev/null @@ -1,125 +0,0 @@ -// -// Copyright 2011 Ettus Research LLC -// -// This program is free software: you can redistribute it and/or modify -// it under the terms of the GNU General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// This program is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. -// -// You should have received a copy of the GNU General Public License -// along with this program. If not, see <http://www.gnu.org/licenses/>. -// - -////////////////////////////////////////////////////////////////////////////////// - -module gpmc_sync - (// GPMC signals - input arst, - input EM_CLK, inout [15:0] EM_D, input [10:1] EM_A, input [1:0] EM_NBE, - input EM_WAIT0, input EM_NCS4, input EM_NCS6, input EM_NWE, input EM_NOE, - - // GPIOs for FIFO signalling - output rx_have_data, output tx_have_space, output bus_error, input bus_reset, - - // Wishbone signals - input wb_clk, input wb_rst, - output [10:0] wb_adr_o, output [15:0] wb_dat_mosi, input [15:0] wb_dat_miso, - output [1:0] wb_sel_o, output wb_cyc_o, output wb_stb_o, output wb_we_o, input wb_ack_i, - - // FIFO interface - input fifo_clk, input fifo_rst, - output [35:0] tx_data_o, output tx_src_rdy_o, input tx_dst_rdy_i, - input [35:0] rx_data_i, input rx_src_rdy_i, output rx_dst_rdy_o, - - output [31:0] debug - ); - - wire EM_output_enable = (~EM_NOE & (~EM_NCS4 | ~EM_NCS6)); - wire [15:0] EM_D_fifo; - wire [15:0] EM_D_wb; - - assign EM_D = ~EM_output_enable ? 16'bz : ~EM_NCS4 ? EM_D_fifo : EM_D_wb; - - wire bus_error_tx, bus_error_rx; - assign bus_error = bus_error_tx | bus_error_rx; - - // CS4 is RAM_2PORT for DATA PATH (high-speed data) - // Writes go into one RAM, reads come from the other - // CS6 is for CONTROL PATH (wishbone) - - // //////////////////////////////////////////// - // TX Data Path - - wire [17:0] tx18_data, tx18b_data; - wire tx18_src_rdy, tx18_dst_rdy, tx18b_src_rdy, tx18b_dst_rdy; - wire [15:0] tx_fifo_space, tx_frame_len; - - assign tx_frame_len = 10; - - gpmc_to_fifo_sync gpmc_to_fifo_sync - (.arst(arst), - .EM_CLK(EM_CLK), .EM_D(EM_D), .EM_NBE(EM_NBE), .EM_NCS(EM_NCS4), .EM_NWE(EM_NWE), - .data_o(tx18_data), .src_rdy_o(tx18_src_rdy), .dst_rdy_i(tx18_dst_rdy), - .frame_len(tx_frame_len), .fifo_space(tx_fifo_space), .fifo_ready(tx_have_space), - .bus_error(bus_error_tx) ); - - fifo_2clock_cascade #(.WIDTH(18), .SIZE(4)) tx_fifo - (.wclk(EM_CLK), .datain(tx18_data), - .src_rdy_i(tx18_src_rdy), .dst_rdy_o(tx18_dst_rdy), .space(tx_fifo_space), - .rclk(fifo_clk), .dataout(tx18b_data), - .src_rdy_o(tx18b_src_rdy), .dst_rdy_i(tx18b_dst_rdy), .occupied(), .arst(arst)); - - fifo19_to_fifo36 #(.LE(1)) f19_to_f36 // Little endian because ARM is LE - (.clk(fifo_clk), .reset(fifo_rst), .clear(0), - .f19_datain({1'b0,tx18b_data}), .f19_src_rdy_i(tx18b_src_rdy), .f19_dst_rdy_o(tx18b_dst_rdy), - .f36_dataout(tx_data_o), .f36_src_rdy_o(tx_src_rdy_o), .f36_dst_rdy_i(tx_dst_rdy_i)); - - // //////////////////////////////////////////// - // RX Data Path - - wire [17:0] rx18_data, rx18b_data; - wire rx18_src_rdy, rx18_dst_rdy, rx18b_src_rdy, rx18b_dst_rdy; - wire [15:0] rx_fifo_space, rx_frame_len; - wire dummy; - - fifo36_to_fifo19 #(.LE(1)) f36_to_f19 // Little endian because ARM is LE - (.clk(fifo_clk), .reset(fifo_rst), .clear(0), - .f36_datain(rx_data_i), .f36_src_rdy_i(rx_src_rdy_i), .f36_dst_rdy_o(rx_dst_rdy_o), - .f19_dataout({dummy,rx18_data}), .f19_src_rdy_o(rx18_src_rdy), .f19_dst_rdy_i(rx18_dst_rdy) ); - - fifo_2clock_cascade #(.WIDTH(18), .SIZE(10)) rx_fifo - (.wclk(fifo_clk), .datain(rx18_data), - .src_rdy_i(rx18_src_rdy), .dst_rdy_o(rx18_dst_rdy), .space(rx_fifo_space), - .rclk(EM_CLK), .dataout(rx18b_data), - .src_rdy_o(rx18b_src_rdy), .dst_rdy_i(rx18b_dst_rdy), .occupied(), .arst(arst)); - - fifo_to_gpmc_sync fifo_to_gpmc_sync - (.arst(arst), - .data_i(rx18b_data), .src_rdy_i(rx18b_src_rdy), .dst_rdy_o(rx18b_dst_rdy), - .EM_CLK(EM_CLK), .EM_D(EM_D_fifo), .EM_NCS(EM_NCS4), .EM_NOE(EM_NOE), - .fifo_ready(rx_have_data) ); - - fifo_watcher fifo_watcher - (.clk(fifo_clk), .reset(fifo_rst), .clear(0), - .src_rdy(rx18_src_rdy), .dst_rdy(rx18_dst_rdy), .sof(rx18_data[16]), .eof(rx18_data[17]), - .have_packet(), .length(), .next() ); - - // //////////////////////////////////////////// - // Control path on CS6 - - gpmc_wb gpmc_wb - (.EM_CLK(EM_CLK), .EM_D_in(EM_D), .EM_D_out(EM_D_wb), .EM_A(EM_A), .EM_NBE(EM_NBE), - .EM_NCS(EM_NCS6), .EM_NWE(EM_NWE), .EM_NOE(EM_NOE), - .wb_clk(wb_clk), .wb_rst(wb_rst), - .wb_adr_o(wb_adr_o), .wb_dat_mosi(wb_dat_mosi), .wb_dat_miso(wb_dat_miso), - .wb_sel_o(wb_sel_o), .wb_cyc_o(wb_cyc_o), .wb_stb_o(wb_stb_o), .wb_we_o(wb_we_o), - .wb_ack_i(wb_ack_i) ); - - assign debug = 0; - -endmodule // gpmc_sync |